Tripple debit order amounts!

My husband and I joined Virgin Active earlier this year on Vitality initially paying R125 at Carlswald, then we moved to Centurion - Hennopspark where we had to change our membership and it was R82.50, each. Come monthed they debit R330 from my account and R82.50 from my husband's account of which we are on the same vitality and same membership? I queried this with Portia at Hennopspark and she said she was working on it....since October! we're going into the 3rd month now and I obviously keep reversing those debit orders but still get calls from annoying debt collectors instead of correcting my membership! How frustrating, now it's affecting my credit record over a stupid error they made on their side. To make it worse there's no follow up whatsoever to resolve this issue, I get tired of calling and emailing to no avail, makes me wonder why I even bother continuing with Virgin Active! Pathetic service :(